Apparatus for inhibitively preventing birds from crowding

Abstract: Birds, especially, pigeons dislike the presence of a magnetic field because each bird has a biological instinctive ability of sensing the presence of the magnetic field. In order to utilize this biological instinctive sensing ability for the purpose of preventing birds from crowding at the upper part of a building, a plurality of magnetic members are disposed on an arm(s) turnably held at the uppermost end of a support column. When a bird perches on the arm, the latter is turned by the action of his own dead weight, resulting in the bird amazingly flying away from the arm. It is effective that a rotary wind blade having two magnetic members immovably secured to the opposite sides thereof is disposed at the uppermost end of each support column so as to largely affect the magnetic field induced by the magnetic members disposed on the arm and the magnetic members disposed on the rotary wind blade. Magnetic members may be disposed on a wire-shaped member tightly spanned between adjacent support columns, a bird threatening unit, a plurality of wires suspending from the upper end of an opening portion located above the veranda of a building or a similar member.

Description: The present invention relates generally to an apparatus for inhibitively preventing birds such as pigeons or the like from crowding at the upper part of a building such as a veranda or the like. More particularly, the present invention relates to improvement of an apparatus of the foregoing type. In recent years, the number of birds such as pigeons, crows, sparrows, gray starlings or the like living in a city increases but droppings and infectious bacilli discharged from birds become a serious problem from the viewpoint of environmental sanitary. In view of the foregoing fact, various proposals have been made with respect to an apparatus for inhibitively preventing birds such as pigeons or the like from crowding inside of a veranda or a similar location on a building by utilizing, e.g., needles, supersonic sound, rapacious bird eye-like convexly marks or the like. In addition, another proposals have been made with respect to an apparatus of the foregoing type in significant consideration of the fact that each bird dislikes the presence of a high intensity of magnetic field because the biological instinctive ability of each bird for sensing the magnetic field (effective for determining the direction of his flying or maintaining an instinct of returning to his home position by himself) is adversely disturbed by the magnetic field. In this connection, it is recommendable that reference is made to an official gazette of, e.g., Japanese Utilization Model Publication NO. 4-10789 (Application No. 63-42278) which discloses a typical apparatus of the aforementioned type. However, this conventional apparatus has the following problem. Specifically, a plurality of semispherical magnets arranged along a tension wire in the substantially equally spaced relationship as seen in the horizontal direction exhibit a function of preventing pigeons from crowding on the tension wire to some extent but some pigeons are not sensitive to the magnetic field, causing them to perch still on the tension wire between adjacent magnets. For this reason, the foregoing proposed apparatus is not satisfactorily acceptable for any user. In addition, a proposal has been made by an applicant common to the present invention with respect to an apparatus for inhibitively preventing birds from crowding at the upper part of a building wherein the apparatus is constructed such that a pair of support columns are caused to stand upright from the handrail of a veranda, a wire is tightly spanned between both the support columns, and a plurality of magnetic members are arranged along the wire in the spaced relationship for the purpose of preventing birds from perching on the veranda (see the specification of Japanese Utilization Model Application NO. 4-93897, Publication No. 6-55374/1994). It is certain that this proposed apparatus is effective for preventing pigeons from perching on the handrail of the veranda. However, in the case that the veranda has a large width, it is necessary that many apparatuses each constructed in that way are mounted on the veranda. When birds invade directly in a room through a window, the proposed apparatus not always exhibits its own function. To cope with the foregoing problem, it is thinkable that all the opening portions on a building are covered with a net or a similar material. However, at the time of an occurrence of emergency such as firing or the like, the net becomes a kind of obstacle not only for persons who want to escape from their room but also for firemen who should enter the room for performing a fire fighting operation. In Patent Abstracts of Japan, Publication No. 02092228 dated April 3, 1999 a bird-defending net has been described. The net is composed of plural crossing yarns wherein magnetic bodies are attached at crossing points of the net. The present invention has been made in consideration of the aforementioned background. An object of the present invention is to provide an apparatus for inhibitively preventing birds such as pigeons or the like from crowding at the upper part of a building such as a veranda or the like wherein the apparatus assures that crowding of birds, especially, pigeons on the rooftop of a building or a similar location can reliably be prevented. Other object of the present invention is to provide an apparatus for inhibitively preventing birds such as pigeons or the like from crowding at the upper part of a building such as a veranda or the like wherein the apparatus can reliably prevent invasion of the birds inside of the veranda or the like, and moreover, it does not become a kind of obstacle for achieving a fire fighting operation to be performed by firemen at the time of an occurrence of firing by dismounting or removing the apparatus from the veranda or the like. Another object of the present invention is to provide an apparatus for inhibitively preventing birds such as pigeons or the like from crowding at the upper part of a building such as a veranda or the like wherein the apparatus assures that excellent bird dispersing properties can be exhibited by effectively utilizing the magnetic field generated by a plurality of magnetic members, the apparatus has long durability, and moreover, the apparatus has a high degree of safety for other kinds of animals rather than the birds. Further object of the present invention is to provide an apparatus for inhibitively preventing birds, especially, pigions, crows, sparrows, gray starlings or swallows from crowing at the upper part of a building wherein the apparatus assures that the veranda, the handrail or the rooftop of a living house, the rooftop of a cathedral, a shrine, a broad casting station's tower or a power-transmission line's tower is not unpleasantly contaminated with their droppings. Further another object of the present invention is to provide an apparatus for inhibitively preventing birds, especially, sea-gulls or similar birds from crowding together wherein the apparatus assures that the sail or the mast of a yacht, the upper surface of each floating buoy or the handrail of a bridge is not unpleasantly contaminated with their droppings. Still further another object of the present invention is to provide an apparatus for inhibitively preventing birds, especially, owls or similar birds from crowding together in the vicinity of a living house wherein the apparatus assures that a person(s) staying in the living house are not unpleasantly disturbed with their crying voice or noisy sound induced by the fluttering of their wings. According to a first aspect of the present invention, there is provided an apparatus for inhibitively preventing birds from crowding at the upper part of a building, wherein the apparatus comprises a first base member secured to the upper end of an opening portion located above the upper part of the building, the first base member extending along the upper end of the opening portion in the horizontal direction; a plurality of wires suspended from the first base member in the equally spaced relationship as seen in the horizontal direction; a second base member detachably secured to the plurality of wires at the lower end parts od the latter to serve also as a weight for the apparatus, the second base member extending in parallel with the first base member in the horizontal direction; a plurality of magnetic members disposed at the lower end parts of the wires above the second base member in the spaced relationship as seen in the horizontal direction; and a wire connecting/disconnecting mechanism for connecting one of the wires or all of the latter to the second base member and disconnecting the former from the latter. The wire connecting/disconnecting is composed of a split type chuck disposed in the second base member so as to allow a wire to be inserted therethrough, a coil spring disposed below the chuck to normally bias the latter in the upward direction so as to hold the chuck from below to assume a connected state, and a depressing pin inserted through a hole formed in the second base member for splitting the chuck into two halves so as to release the wire from the connected state. It is preferable that a depressing plate is arranged above the second base member in order to simultaneously release some or the wires or all of the wires from the connected state by actuating the wire connecting/ disconnecting mechanism. Moreover, according to a second aspect of the present invention, there is provided an apparatus for inhibitively preventing birds from crowding at the upper part of an opening portion located at the upper end of the building, the first base member extending along the upper end of the opening portion in the horizontal direction; a plurality of wires suspended from the first base member in the equally spaced relationship as seen in the horizontal direction; a second base plate detachably secured to the plurality of wires at the lower end parts of the latter to serve also as a weight for the apparatus, the second base member extending in parallel with the first base member in the horizontal direction; a plurality of magnetic members disposed at the lower end part of the wires above the second base member in the spaced relationship as seen in the horizontal direction; and a curtain mechanism arranged below the first base member to displace some of the wires or all of the same together in the horizontal direction so as to form a wide hollow space between the first base member and the second base member in order that persons living in a room can quickly escape from the latter through the wide hollow space or firemen can easily enter the room through the same at the time of an occurrence of emergency such as firing or the like. Usually, the curtain mechanism is composed of a casing, a rail received in the casing, and a plurality of hooks displaceably held by the rail for suspending the wires therefrom in such a manner as to allow the wires to be slidably displaced in the horizontal direction with the aid of the rail. Other objects, features and advantages of the present invention will become apparent from reading of the following description which has been made in conjunction with the accompanying drawings. The present invention is illustrated in the following drawings in which: Fig. 1 is a front view of an apparatus for inhibitively preventing birds, especially, pigeons from crowding at the upper part of a building wherein the apparatus is constructed in accordance with a twelfth embodiment of the present invention; Fig. 2 is a fragmentary enlarged sectional view of the apparatus shown in Fig. 1, illustrating essential components constituting the apparatus; Fig. 3 is a schematic front view of the apparatus represented by solid lines, illustrating the operative state that the apparatus is arranged on the veranda of the building represented by phantom lines; Fig. 4 is a front view of an apparatus for inhibitively preventing birds, especially, pigeons from crowding at the upper part of a building wherein the apparatus is constructed in accordance with a thirteenth embodiment of the present invention; Fig. 5 is a fragmentary enlarged front view of the apparatus, illustrating a curtain mechanism employed for the apparatus shown in Fig. 4; Fig. 6 is a fragmentary enlarged sectional view of the apparatus taken along line A - A in Fig. 5; and Fig. 7 is a front view of the apparatus, illustrating the operative state that some of wires are displaced from their original positions in the leftward direction with a reduced distance held between adjacent wires. An apparatus constructed in accordance with a first embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 3. In the drawings, reference numeral 301 designates a first base member, reference numeral 302 designates a plurality of wires which are suspended from the first base member 301 in the equally spaced relationship as seen in the horizontal direction, reference numeral 303 designates a second base member which is secured to the lower end part of each wire 302, and reference numeral 304 designates a wire connecting/ disconnecting mechanism for attaching some of the wires 302 or all of the latter to the second base member 303 and detaching the former from the latter. The longitudinally extending first base member 301 is secured to a ceiling 307 of a building 305 at the rear end of an opening portion 306 of the building 305 located above a veranda (see Fig. 3) by tightening a plurality of screws, and a number of wires 302 each of which one end is fixed to the first base member 301 are suspended from the latter in the equally spaced relationship as seen in the horizontal direction while extending in parallel with each other, in order to prevent birds from entering the opening portion 306 of the building 305 through plural lines of wires 302. The distance between adjacent wires 302 is changed depending on the kind of birds, and in the case of pigeons, it is preferable that the distance is set to about 5 to 10 cm. As shown in Fig. 3, the length of each wire 302 is dimensioned to be equal to a distance between the ceiling 307 and the upper surface of a handrail 308. The second base member 303 is located on the rear end side of the wires 302, and a plurality of holes are formed through the second base member 303 so as to allow the wires 302 to extend through the second base member 303. It should be noted that the second base member 303 serves also as a weight for preventing the wires 302 from being flapped away from the vertical plane by the action of the air stream which has collided against the wires 302. The wire connecting/disconnecting mechanism 304 may be constructed in any suitably acceptable manner. In the shown case, the wire connecting/disconnecting mechanism 304 is constructed such that a chuck 309 is disposed in the second base member 303 so as to allow a wire 302 to be inserted therethrough, a coil spring 310 adapted to biasing the chuck 309 in the upward direction to hold the chuck 309 from below is disposed below the chuck 309, and a depressing pin 311 is inserted through the hole of the second base member 303 for splitting the chuck 309 into two halves to release the wire 302 from the connected state. When the depressing pin 311 is depressed against the resilient force of the coil spring 310, the chuck 309 is openably split to two halves to assume a loosened state, enabling the wire 302 to be slidably displaced in the upward/downward direction. On the contrary, when the depressing pin 311 is released from the depressed state, the chuck 309 assumes a closed state by the resilient force of the coil spring 310, causing the wire 302 to be immovably seized by the chuck 309. When each wire 302 is disconnected from the second base member 303, it is sufficient that the depressing pin 311 corresponding to the foregoing wire 302 is depressed with a user's hand. However, in the case of an occurrence of emergency such as firing or the like, since a manual depressing operation as mentioned above takes an excessively long time, it is desirable that a depressing plate 312 is arranged above the second base member 303 so as to simultaneously depress all the depressing pins 311 with a user's hand or foot to disconnect all the wires 302 from the second base plate 303. In this case, when it is found that the depressing of the depressing plate 311 in that way may cause the second base member 303 to dangerously fall down, it is recommendable that the length of the depressing plate 312 is adequately adjusted such that the depressing plate 312 does not come in contact with some depressing pins 311 located at the opposite ends of the second base member 302 as shown in Fig. 1. In the drawings, reference numeral 313 designates a spherical magnetic member. In general, since a bird, especially, a pigeon has a biological instinctive ability of sensing a magnetic field (which serves to determine his flying direction or find a route for returning to his home position by himself), a plurality of spherical magnetic members 313 are arranged on the wires 302 in the equally spaced relationship as seen in the horizontal direction. In the shown case, four wires 302 located between adjacent spherical magnetic members 313 have no spherical magnetic member disposed thereon, respectively. Alternatively, spherical magnetic members 313 may be disposed on all the wires 302. In this case, it is desirable that a height of disposing a spherical magnetic member on the corresponding wire is changed from wire to wire in order to prevent adjacent spherical magnetic members from being magnetically attracted to each other. As shown in Fig. 3, an outdoor unit 314 for an air conditioner is often placed on the veranda of a building. In this case, there is a tendency that birds are liable to crowd on the veranda for looking for the heat generated by the outdoor unit 314. In some case, a bird's nest is built on the veranda. This leads to the result that the veranda is contaminated with bird droppings, causing the veranda to become unsanitary. However, since the opening portion 306 of the building located above the veranda is completely closed with the apparatus constructed in the above-described manner, there does not arise a malfunction that birds enter the veranda and crowd on the latter. It should be emphasized that the wires 302 are caused to extend in the vertical direction but not extend in the horizontal direction. Consequently, any bird can not perch on a wire while seizing it with his feet. In addition, at the time of an occurrence of emergency such as firing or the like, all the wires 302 can easily be disconnected from the first base member 303. With this construction, it is easy that persons staying in a room escape outside of the room or firemen enter the room for performing a fire fighting operation. Owing to the arrangement of the spherical magnetic members 313 in that way, the apparatus can reliably prevent not only invasion of birds inside of the veranda but also approaching of them to the veranda without any possibility of injuring the birds. In Fig. 3, reference numeral 315 designates the interior of a room, reference numeral 316 designates an entrance located between the room 315 and the veranda, and reference numeral 317 designate a floor of the building. Next, an apparatus constructed in accordance with a second embodiment of the present invention will be described below with reference to Fig. 4 to 7. In this embodiment, same parts or components as those in the preceding embodiment are represented by same reference numerals. Thus, repeated description on them will not be required. In this embodiment, a curtain mechanism 318 is substituted for the wire connecting/disconnecting mechanism 304 in the preceding embodiment. Specifically, a plurality of hooks 321 are disposed in a casing 319 to slidably move along a rail 20 received in the casing 319, and a wire 302 is suspended from each of the hooks 321. To assure that the respective wires 302 are spaced away from each other as seen in the horizontal direction with a certain distance held between adjacent wires 302 while they are kept in the opened state, the upper end of each wire 302 is folded to assume a substantially inverted U-shaped contour and the jointed part of the wire 302 is supported by a flexible support member 322. It should be noted that the structure of the curtain mechanism 318 (composed of the casing 319, the rail 320 and the hooks 321) is substantially same to that of a curtain mechanism employed for a usual personal room. Similar to the apparatus in the preceding embodiment, a base member 323 serving also as a weight and a plurality of spherical magnetic members 313 are arranged at the lower parts of the wires 302 in order to prevent the wires 302 from being fluttered. With such construction, since an opening portion 306 located above the veranda of a building is completely closed with a plurality of wires 302 arranged in the equally spaced relationship as seen in the horizontal direction, the apparatus can reliably prevent birds from invading inside of the veranda and crowding on the latter. In addition, at the time of an occurrence of emergency such as firing or the like, the apparatus makes it possible that persons staying in a room easily escape outside of the room or firemen easily enter the room by slidably displacing the wires 302 in the leftward direction or in the rightward direction as shown in Fig. 7 in order to form a wide open space for the persons living in the room and the firemen. Owing to the arrangement of the spherical magnetic members in that way, the apparatus can reliably prevent not only the invasion of birds inside of the veranda but also the approaching of the birds to the veranda in the same manner as the preceding embodiment. While the present invention has been described above with respect to preferred embodiments thereof, it should of course be understood that the present invention should not be limited only to these embodiments but various change or modification may be made without any departure from the scope of the present invention as defined by the appended claims.

Claims: An apparatus for inhibitively preventing birds from crowding at the upper part of a building, comprising; a first base member (301) secured to the upper end of an opening portion located above the upper part of said building, said first base member extending along the upper end of said opening portion in the horizontal direction, a plurality of wires (302) suspended from said first base member (301) in the equally spaced relationship as seen in the horizontal direction, a second base member (303) detachably secured to said plurality of wires (302) at the lower end parts of the latter to serve also as a weight for said apparatus, said second base member (303) extending in parallel with said first base member (301) in the horizontal direction, a plurality of magnetic members (313) disposed at the lower end parts of said wires above said second base member (303) in the spaced relationship as seen in the horizontal direction, and a wire connecting/disconnecting mechanism (304) for connecting one of said wires or all of the latter to said second base member and disconnecting the former from the latter. The apparatus as claimed in claim 1, wherein said wire connecting/disconnecting mechanism (304) includes a split type chuck (309) disposed in said second base member (303) so as to allow a wire (302) to be inserted therethrough in the disconnected state, a coil spring (310) disposed below said chuck (309) to normally bias the latter in the upward direction so as to hold said chuck from below to assume a connected state, and a depressing pin (311) inserted through a hole formed in said second base member (303) for splitting said chuck (309) into two halves so as to release said wire (302) from the connected state. The apparatus as claimed in claim 1 or 2, wherein a depressing plate (312) is arranged above said second base member in order to simultaneously release some of said wires (302) or all of said wires (302) from the connecting state by actuating said wire connecting/disconnecting mechanism (304). An apparatus for inhibitively preventing birds from crowding at the upper part of a building, comprising; a first base member (319) secured to the upper end of an opening portion located at the upper end of said building, said first base member (319) extending along the upper end of said opening portion in the horizontal direction, a plurality of wires (302) suspended from said first base member in the equally spaced relationship as seen in the horizontal direction, a second base member (323) detachably secured to said plurality of wires (302) at the lower end parts of the latter to serve also as a weight for said apparatus, said second base member extending in parallel with said first base member in the horizontal direction, a plurality of magnetic members (313) disposed at the lower end part of said wires above (302) said second base member in the spaced relationship as seen in the horizontal direction, and a curtain mechanism arranged below said first base member (319) to displace some of said wires (302) or all of the same together in the horizontal direction so as to form a wide hollow space between said first base member (319) and said second base member (323) in order that persons living in a room can quickly escape from the latter to the outside through said wide hollow space or firemen can easily enter said room through the same at the time of an occurrence of emergency such as firing or the like. The apparatus as claimed in claim 4, wherein said curtain mechanism includes a casing (319), a rail (320) received in said casing, and a plurality of hooks (321) displaceably held by said rail for suspending said wires (302) therefrom in such a manner as to allow said wires to be slidably displaced in the horizontal direction with the aid of said rail (320).

Inventors: OHBA TADAO, OHBA, TADAO
Applicants: OHBA BUILDING MAINTENANCE CO L, OHBA BUILDING MAINTENANCE CO., LTD.
Application year: 1994
Main classification: A01M29
IPC codes: A01M29, E04D13